AMP Google Analytics Plugin

I’m very new to wordpress plugin editing so be kind ??

I’ve created an admin setting page so that users can input their GA tracking code and I have it saved. I want to populate into their amp pages. Problem is I don’t know how to actually bring in the tracking code there. Here is the analytics code in the template where I need it to show up:

<script async custom-element="amp-analytics"
    src="https://cdn.ampproject.org/v0/amp-analytics-0.1.js"></script>

<amp-analytics type="googleanalytics" id="analytics1">
    <script type="application/json">
{
  "vars": {
    "account": "UA-XXXXXXX-XX"
  },
  "triggers": {
    "trackPageview": {
      "on": "visible",
      "request": "pageview"
    }
  }
}
    </script>
</amp-analytics>

I need the tracking code to pull the info from my options. I tried echoing it
<?php echo $options['ga_account']; ?>
but soon realized that you can’t really do that within the script. Can someone point me in the right direction? How do I pull an options value into the GA code above without breaking it?

Like I said, I’m pretty new to this stuff.